Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1947c1b3b0bbdf…

MALICIOUS

PDF

74.0 KB Created: 2021-02-22 07:30:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 41c69993939fbe523221dd51cad7e8d7 SHA-1: 3ce3411a3252b7d12e937582f928cddf5f74b344 SHA-256: 5e1947c1b3b0bbdf80918fec64e0de01a693c5f3f87d0b2bece4eb49f2e71932
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'games and sports in physical education' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/strik?utm_term=what+is+the+importance+of+games+and+sports+in+physical+education PDF link annotation
    • http://tameeniraq.com/fadegujixuzazonuwenelw5gm.pdfIn PDF document text
    • http://fojibewuf.iblogger.org/83539223603.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/96e673fab5.pdfIn PDF document text
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/sekedudufu-nagunilatozosok-tapos-wekivutaletor.pdfIn PDF document text
    • http://ketousa.site/free_fake_divorce_certificate_templatespqk0j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/petubapizo/instagram_for_android_4._0._4.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/spreadsheet_software_free_excel.pdfIn PDF document text
    • http://vegewamofuxa.rf.gd/baabul_movie_all_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/degezijopav.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/axess_tvd1801-_13_manual.pdfIn PDF document text
    • http://zufonokimilije.epizy.com/webinigaxukuroseveripu.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/94284060304.pdfIn PDF document text
    • http://vejebuta.rf.gd/gewisonijusifaj.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/nitirumemo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5684 bytes
SHA-256: 56e65057773b2919bdce6946fa99133a0c41110f473926d5b6bc642f7a048102
font_01_sfnt_off0000f54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 10848 bytes
SHA-256: c2763969897f54e056d478b94c59e92173b5d9de0aecbeb8abe4243069c1a4a8

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